qt 6.5.1 original

tests/benchmarks/widgets/graphicsview/qgraphicsview/benchapps/moveItems/CMakeLists.txt

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+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+#####################################################################
+## moveItems Binary:
+#####################################################################
+
+qt_internal_add_benchmark(moveItems
+    GUI
+    SOURCES
+        main.cpp
+    LIBRARIES
+        Qt::Gui
+)

tests/benchmarks/widgets/graphicsview/qgraphicsview/benchapps/moveItems/main.cpp

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+#include <QtGui>
+
+#include "valgrind/callgrind.h"
+
+class View : public QGraphicsView
+{
+    Q_OBJECT
+public:
+    View(QGraphicsScene *scene, QGraphicsItem *item)
+        : QGraphicsView(scene), _item(item)
+    {
+    }
+
+protected:
+    void paintEvent(QPaintEvent *event)
+    {
+        static int n = 0;
+        if (n)
+            CALLGRIND_START_INSTRUMENTATION
+        QGraphicsView::paintEvent(event);
+        _item->moveBy(1, 1);
+        if (n)
+            CALLGRIND_STOP_INSTRUMENTATION
+        if (++n == 200)
+            qApp->quit();
+    }
+
+private:
+    QGraphicsItem *_item;
+};
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+
+    if (argc < 2) {
+        qDebug("usage: ./%s <numItems>", argv[0]);
+        return 1;
+    }
+
+    QGraphicsScene scene(-150, -150, 300, 300);
+    scene.setItemIndexMethod(QGraphicsScene::NoIndex);
+
+    QGraphicsRectItem *item = scene.addRect(-50, -50, 100, 100, QPen(Qt::NoPen), QBrush(Qt::blue));
+    item->setFlag(QGraphicsItem::ItemIsMovable);
+
+    for (int i = 0; i < atoi(argv[1]); ++i) {
+        QGraphicsRectItem *child = scene.addRect(-5, -5, 10, 10, QPen(Qt::NoPen), QBrush(Qt::blue));
+        child->setPos(-50 + QRandomGenerator::global()->bounded(100), -50 + QRandomGenerator::global()->bounded(100));
+        child->setParentItem(item);
+    }
+
+    View view(&scene, item);
+    view.resize(300, 300);
+    view.show();
+
+    return app.exec();
+}
+
+#include "main.moc"